Minneburg was built some time in the 1200s, though its origin unknown. According to legend, the castle name was derived from a woman, Minna von Horneck by name, who was the love of Graf von Schwarzenberg who left on the Crusades. When he returned he found her on her deathbed and promised to build a castle in her honor.
The Bergfried, or main tower, as well as the palas were completed around 1300, situated on a prominent rock outcrop above the Neckar River. The shieldwall was built between 1518-1521 and was composed of two separate walls, of which the outer along the dry moat has mostly vanished. The first official mention of the castle appears to have been in 1339, with the early owner being Eberhardt Rudt von Collenberg, a scion of a Frankish noble family that owned and traded properties from the Rhein to the Neckar. As early as 1349, the castle was pawned to Ruprecht I Elector Palatinate, then later to Hofwart von Sickingen, and then later to the von Steinach family, only to once more settle into the possession of the Elector Palatinate in 1499.
By the early 1500s, the castle passed to Vogt Wilhelm von Harben, who extended the outer works of the castle and added some amenities such as running water. The family line died out around 1600, and the castle became a winery. Despite such a 'peaceful' purpose, the castle was still defended for the Protestant cause against the Catholic League troops of Count Tilly. Tilly besieged the castle in 1622, which soon surrendered after some significant damage when the walls were breached. Afterwards, the ruin was used as a quarry for the locals who pilfered the stones for their own building projects. Efforts to prevent futher deterioration of the ruin began in the late 1800s, but these were suspended for many years until the 1970s.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.